Mechanical movement



UNITED STATES PATENT O FICE.

SIMEON B. CURTIS, or SPRINGFIELD, ILLINOIS.

MECHANICAL MOVEME NT.

SPEGIFICATIQN forming part of Letters Patent No. 530,638, dated December 11, 1894. Application filed September 21,1893. Serial in, 486,096. (No model.)

, tion as will enable those skilled in the art to which it pertains to make and use my said invention.

The purpose of my invention is to provide simple and efiective means for converting rotary motion into reciprocatingmotion.

My invention is adaptable to and may be applied on any machine in which it is desired to convert rotary into reciprocating motion.

My invention consists of certain novel features of construction and combinations of mechanism illustrated in the annexed drawings, .to which reference is hereby made, and hereinafter fully described and specifically claimed.

In the drawings-Figure 1- is a side elevation of the complete machine. Fig. 2 is a vertical transverse section on the line 2 of Fig. 1. Fig. 3 is a horizontal section on the line 3 of Fig. 2. Fig. 4c is an enlarged detached perspective view of the rotary arm and shows the pivotal pawl in position on the arm. Fig. 5- is an enlarged detached combined perspective and sectional view of a part of the left hand channeled wheel D and shows'the position and the form of the channel d, one of thecams d, and one of' the ledges d in said wheel. Fig. 6- is an enlarged detached combined and perspective and sectional viewof a part of the right hand channeled wheel D, and shows the position and form of the channel, the cams and the ledges in that wheel.

Similar letters indicate like parts in all of the views. 1

The base A is provided with integralstandards a. At the top of the standards a are journal boxes a. A shaft B revolves in the boxes 0.. A crank O, (or other suitable means such as a pulley or cog gear for example) is secured to one end of and serves to rotate the shaft. The bevel cog wheels D and D which will hereinafter be described in detail are supported and are loose on the shaft B.

The rotating arm E is secured to the shaft B between the'wheels D and D and turns with the shaft. A pawl F is pivotally' supported ina slot e on a transverse pin 6., in the end of G on the bas'eA andpermits such adjustment of the pinion H relative to the wheels D and D as will cause the pinion to mesh properly 1 with said wheels.

In the inner face of each of the wheels D and D is an annular channel or way 01 adapted to receive the reduced ends f or f as the case may be, of the pivotal pawl F. At one or more points of the channel at are situated defleeting. cams or wedges d which serve to actuate the pivotal pawl F as hereinafter explained. Adjacent to the cams d are shoulders or ledges d with which the points f engage to alternately turn the wheels D and D.

The wheels D and D are exactly alike except that one has right hand cams and ledges, and the other has left handcams and ledges, that is to say:when viewed fromthe front of the wheel D, the cams d in that wheel incline to the I right. as shown in Fig. 5; and when viewed from the front of the wheel D, the cams in that wheel incline to the left as shown in Fig. 6, but when the wheels are in place face to face on the shaft B, the cams in both wheels incline and the ledges in both in the channel of the wheel D, while the other end of the pawl fits loosely and moves in the channel in the wheel D.

Any suitablemechanism may be connected in any convenient manner with the lower projecting end of the alternating shaft G as for example the beater of a churn, or the rubber of a washing machine, &c.

I do not restrict myself to the application of my invention to machines of any particular class as it may obviously be applied to a great variety of machines.

The operation of the mechanism is as foll0ws:The crank Ois turned to the left thereby turning the shaft B and the connected arm IO E in the same direction. The arm E carries around with it the pawl F and the end f of the pawl runs freely in the channel (1 until the end f engages with the ledge (1 thereby causing the wheel D to turn in the same direction as the shaft B and drive the pinion H to the left. The pinion being in mesh with the wheel D drives the wheel D to the right or in a direction contrary to the rotative direction of the shaft B until the end 1 of the pawl F running in the channel of the wheel D rides on the cam d in said wheel and is raised sufliciently to depress the opposite end f of the pawl and release it from engagement with the ledge d and permit it to run in the 2 5 channel d of the wheel D and at the same time bring the end f of the pawl into engagement with the ledge in the channel of the wheel D, thereby causing the wheel D to change its direction of motion and revolve in the same direction as the shaft B. The wheel D then drives the pinion H to the right and the end f of the pawl F runs backward in the channel of the wheel D until that end of the pawl engages with the cam d and raises the 5 end f of the pawl into engagement with the ledge d of the wheel D and depresses the other end of the pawl and releases it from engagement with the ledge in the channel of the wheel D. The wheel D then ceases to be 0 driven and again becomes the driver and so on continually.

I have shown and described two cams and two ledges on each of the wheels D and D, but a greater or less number of cams and 4 5 ledges may be used for the purpose of varying the frequency of the change of direction, without departing from my invention. Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a mechanical movement the means adapted to alternately engage parallel wheels with and disengage them from a supporting shaft on which said wheels turn, to witz-a I suitably supported driving shaft, bevel cog wheels face to face, loose on said shaft, said wheels having channels in their inner faces 2. In a mechanical movement the combination of the base, the standards, on the base, the driving shaft supported and turning on said standards the means for rotating said driving shaft, the driven shaft supported -on and turning in the base, the parallel cog wheels loose on the driving shaft, said cog wheels having annular channels in their faces and having cams and lodges projecting into said channels, the arm secured to and turning with the driving shaft, the pawl pivotally supported in the end of said arm, the ends of said pawl being adapted to run in the channels in said wheels, and the pinions secured to the driven shaft and meshing with both of the wheels on the driving shaft, as set forth.

3. A pawl for a mechanical movement,

widened at its central part, adapted to turn on a pivot and having reduced ends adapted to run in channels; in combination with an arm secured to a rotatable driving shaft and adapted to pivotally support said pawl, parallel cog wheels loose on said shaft provided with channels and having cams and ledges projecting into said channels, and a pinion secured to the driven shaft and meshing with both of the cog wheels on the driving slraft, as set forth.

4.. In a mechanical movement the combination of the base, the integral standards on the base, the journal boxes on the standards, the rotatable driving shaft supported in the boxes, the parallel cog wheels loose on. said shaft, provided with channels and having cams and ledges extending into said channels, the arm between said wheels, secured to and turning with the driving shaft, the pawl on said arm adapted to run in channels, the driven shaft, 3 the bevel cog pinion meshing with said wheels I and connected with the driven shaft, and the adjustable collar on the driven shaft, as set forth and for the purpose stated.

In witness whereof I have hereunto sub- 1 scribed my name, at Springfield, Illinois, this 13th day of September, A. D. 1893. SIMEON B. CURTIS.

Witnesses:

EDWIN F. SMITH,

AD BAILEY. 

